Kalkkitiili

Kalkkitiili, also known as lime-sand brick, is a building material made from sand and lime. The manufacturing process involves mixing sand with a small amount of hydrated lime, which acts as a binder. This mixture is then pressed under high pressure into brick shapes. The bricks are hardened through a process that can involve autoclaving, where they are exposed to steam under pressure, or through natural air curing.

The use of kalkkitiili dates back to the 19th century, with its popularity increasing in the early 20th century, particularly in Germany and Scandinavia. It was often seen as an alternative to traditional fired clay bricks. Kalkkitiili is known for its strength, durability, and good thermal insulation properties. Its production is generally considered less energy-intensive than that of fired bricks.

The composition of kalkkitiili means it has a porous structure, which can allow for moisture to pass through. This property can be beneficial for regulating indoor humidity but also requires consideration in building design to prevent water ingress. The material is also generally resistant to frost and fire. Over time, research and development have led to variations in its formulation and production methods to enhance its performance and suitability for a wider range of construction applications.